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प्रश्न
In an a.c. generator the speed at which the coil rotates is doubled. How would this affect
- the frequency of output voltage,
- the maximum output voltage is doubled.
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उत्तर
- In an a.c generator, if the speed at which the coil rotates is doubled, the frequency is also doubled.
- The maximum output voltage is also doubled.
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संबंधित प्रश्न
The essential difference between an AC generator and a DC generator is that
Explain the principle of an electric generator.
Each one of the following changes will increase emf (or voltage) in a simple generator except:
(a) increasing the number of turns in the armature coil
(b) winding the coil on a soft iron armature
(c) increasing the size of the gap in which the armature turns
(d) increasing the speed of rotation
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State one advantage of using a.c. over d.c.
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a) Identify the machine shown in figure.
b) Write a use of this machine.
c) How transformation of energy takes place in this machine.
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Observe the figure and write the answers to the questions asked.
- The construction shown in the figure is of which device?
- Explain the principle on which this device works.
- Write any three uses of this device.
The part of the AC generator that passes the current from the armature coil to the external circuit is ______.
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A: Held stationary
B: Moved away along its axis
C: Moved towards along its axis
D: There will be an induced current in
